Freezing in place as her eyes catch movement out in the back yard, Amy's eyes shoot wide as her heart begins to pound as she watches the female figure for a second, not quite able to make up her mind yet as to her course of action. Should she run and lock the door, call for Bart, or check to see if the woman is alright? And what about those still out in the truck? If this was a creature, there might be more around.
Swallowing the lump in her throat she manages to call back to Bart, "There's someone in the backyard," but continues to the back door, stopping just short of the threshold so she could peer around the corner and keep an eye on the woman, while not fully exposing herself in the process.